Rope guard for paper making machines



March 16, 1937. R, CARPENTER ROPE GUARD FOR PAPER MAKING MACHNES Filed NOV.I l, 1935 5 Sheets-Shes?I l INVENTOR RUSSELL CARPENTER mmm ATTORNEY March 16, 193.7. R5: CARPENTE 2,074,045

ROPE GUARD FOR PAPER MAKING MACHINES Filed Nov. 1, 1935 3 sheets-sheet `2 imm 13b Juift Il ATTORNRY March 16, 1937. R, AQARPEMER y l 2,074,045

` ROPE GUARD FOR PAPER MAKIN Filed NOV. l, 1935 3 Sheets-Sheet 3 INVENTOR RUSSELL cAR PEN-rea rPatented-Mar; 1931- i y UNITED eSTA*lj-F.',Si'

PATENT o-FFicE Rivers, Quebec. Canada Apueauennovember 1, 1935, serial No. 4ms; In canada november s, 1934 schim. (01. .s4-4s) Thisinvention relates to rope guards for pre venting accidental'displacement and breakage of the carrier ropes associated with the dryer rolls oi' a Fourdrinier .paper making machine.

5 More particularly, the invention relates to improvements in rope guards of the kind disclosed in my prior United States'Patent No. 1.660.917, granted Feb. 28, 1928.

One object of the presentinventionis to pre- 10 vent rope displacement due toaccumulation of wads oi broken paper between opposing grooved portions of adjacent dryer rolls contained in the same row and is 4achieved Vby providing the guards with deilectors whereby wads o! broken 15 papery thrown or'carried towards the ropes are intercepted and deilected back towards the cen' trai portions of the dryer rolls. l Another object is to prevent rope displacement resulting rromwads 4or other accumula- 20 tions of broken paper being carried around in the roll grooves and being caught beneath the ropes as they enter said grooves. This object is achieved by providing the guards with wall portions arranged`i'.oV overlie and obstruct por- 25 tions oi the dryer roll grooves located immediately in advance ofthe .points of entry of the rolls.

Another object is the provision of rope guards constructed to completely enclose the ropes, so

Iim that it is impossible vfor wads or other accumulations ot brokenpaper to engage the ropes at or immediately in advanceot thepoints of entry` o! the ropes into .the dryer roll grooves.'

' Other objects andad of the inven- .35 tion, as twell as the details. of construction. will be more readily understood from the following, detailed descriptionmaken vin'-connect ion with the accompanying drawings, inwhich Fig. '1 is a diagrammatic view of a Aportion door the dryer section oi a Fourdrinier paper makingy machine equipped with guards constructed and applied in accordance with my invention.

Fig. 2 is a fragmentary sectional view along vthe line" 2-2 o! Pig. 1.

l '45 Flg..3 is-a rear'elevation oi.' one ofthe guards as'it appears in place on a'dryer roll.

- F154 isa iront elevation otone of the guards e as; it .apper'inplace 4on a dryer roll.

Fig. 5'is a perspective-view or theguard ap' copeanngintneprecedingiigln'es. 1 f llig-.isa-pempectiveviewotamodiiiedtorm orguard.

roll= equimdmith guard constructed fdisclosedinng.

ication voi? the 'or vpaper in contact with .the deilector Fig. 8 is a iront elevation of the roll and guard assembly appearing in Fig. '1.

Fig. 9 is a bottom plan view ofthe guard appearing in Figs. 'I and 8.

. Fig. 10 isa. view looking towards one end yof 5 i the guard appearing in Figs. 7 and 8.

Fig. l is-a view looking towards the opposite end of the guard appearing in' Figs. 7 and 8.

Fig. 12 is 'a perspective view oi a slight modiguard -appearing in Figs. 6 to `10 llinclusive.

In Fig. 1 of the drawings, I have shown a portion or a conventional Fourdrinier dryer section including the frame structure 5, the dryer rolls 6 and the carrier ropes 1, the latter running in peripheral grooves, 8 formed in the dryer rolls adjacent their front ends. According to the present invention each. dryer roll is equipped with a rope guard l arranged adjacent the point where the ropes .enter the groove 8. 280

which the rop'es vare received and held against 30 undue displwement. The side wall Il and the lower edge oiy the virontwall. i8 lie close to the periphery of lthedryer roll and have approximately thesame curvature. Y

Due-to the varying width of the front wall.

lli, the sidewall I2 is disposed at such a tangent to the .dryer roll that the distance between this wall and the periphery of the dryer roll gradually diminishes to a relatively small clearance at the end'ot the wall nearestthe point where the ropes enter the groove 8.

-end vnearest the point of entry of the ropes into -the groove 8.

A- deector ange I3, formed integral with the free longitudinal edge of this wall, is thus disposed at an oblique angle to the longitudinal axis of the dryer roll so that wads wiilbe deilected toward. the centen ot the roll,

It will beobserved that the side wallA and II and is disposed to cover the rope groove for a short distance in advance of the point oitheropes. Oneendoi'wall il terwith a lug I4 projecting into the groove 8. The other end of wall II terminates at a point inter- 5 mediate the length of the walls III and I2 and is preferably bevell'edas indicated atl la.

Each of the guards described in the foregoing l is supported from the frame 5 by means of a bracket I5Y which may be attached to the 'frame and guard in any suitable manner. .As here shown one end of the bracket is removably fastened to the frame by bolts I6 or other suitable fastening means. The other end of the bracket isA fastened to the guard by a bolt I1 l5 having its head and shank portions fitted in a T-shaped slot I8 formed'in an integral projection or lug I9 of the guard.A Wheri the bolt I6 is loosened the slot II permits the guard to be adjusted on the'bracket I5.

When dryer rolls are equipped with guards constructed and applied as herein described, there is no danger of the ropes leaving thel dryer roll grooves and becoming entangled with the frame or other parts of the dryer since lateral displacement of the ropes toward the front end of the rolls is prevented by the front. guard wall I0 while undue radial displacement of the ropes is prevented by the overlying guard Wall I2 which approaches close to the periphery of the roll at the point where the ropes enter the groove. The housing of the ropes in the channel formed by the guard walls I0, II, and I2 is another factor in preventing rope displacement since it makes it more diil'icult for wads or other 3@accumulation of broken paper to become entangled with the ropes as they enter the dryer roll groove.

. ector I3 is also an important feature. In the absence of this deilector wads or other accumu- `40 lations of paper thrown forwardly against the guards may sometimes be carried past the guards l and caught between the rope carrying grooves of adjacent dryer rolls contained in the same row. When this happens the ropes are frequently forced out of the grooves by the pressure of the wads caught between the rolls. The.

enter the groove. Lug I4 is made narrower than.

groove 8 to permit endwise play of the roll.4

The modification appearing in Figs. 6 to 11' inclusive, aifords a rope guard which completely encloses the portions of the ropes passing therethrough. In this case the side walls I2 of the guard are'divided into two sections designated I2a and I2b, the former being integral'with the -being hinged to the upper edge of the front wall as indicated at 20. A rear wall 2l and an `end wall 22 are formed integral with the hinged side wall section I2b. When theparts are arranged as' shown in Figs. 7 to 11 inclusive the rear side of the rope passage through the guard is closed off by the rear wall 2I while the mouth of the passage is substantially closed by the end wall 22 in which a slot 23 is formed for the 75 passage of the ropes. Intermediate its length The provision of the inclined .de-

upper edge of the'f'ront wall I Il and the latter the rear wall 2| is provided with an offset portion 25 affording an inclined deflecting surface 26 which takes the place of the previously described deflctor I3. A lever extension 26, formed integral with the hinged side wall section I2b, is adapted to be connected with any suitable operating mechanism for swinging the walls 2land 22 to the position shown in Fig. 6 so that the guard may be readily opened when the ropes are being used to guide the paper through the dryer or when opening of the guard is desired to permit removal of the ropes.

When the carrier ropes 1 are being lused to guide the paper over the dryer rolls (when starting up a machine or after a break in the paper sheet) the guard is opened by swinging walls it completely encircles the ropes adjacent their point of entry into the roll groove. v

In Fig. 12 I have shown a cylinder and piston device for controlling the opening and closing of the guard. As here shown lthe lever extension 26 is secured by a pivot connection 21 to a cylinder 28. A piston 29, working in the cylinder `28, is connected by'its piston rod A30 to an arm 3| projecting outwardly from the guard Wall IIJ. Air is admitted to and withdrawn from the lower end of the cylinder through a port 3| adapted to be connected with a suitable lheader (not shown). This header is equipped with a three-way valve for placing it in communication with a source of pressure or with anexhaust opening.

Having thus described my invention, what I claim is:-

1."In a Fourdrinier paper making machine the combination of a rotary drying roll having a peripheral groove, carrier ropes arranged to run in said groove and a rope guard presenting a rope receiving channel overlying the groove immediately in advance of the point where the ropes enter said groove, said guard comprising a front wall lying perpendicular to the -peripherv of the roll immediately in front of said groove and side walls projecting rearwardly over the groove to form the rope receiving channel.

2. AIn a paper making machine the combination of a rotary dryer roll having a peripheral groove, can'ier ropes arranged to run-in said groove, and a rope guard for preventing displacement of the ropes from said groove, said guard comprising a front wall lying perpendicular to the periphery of the roll immediately in front of the groove and side walls projecting ,rearwardly over the groove to form a vchannel in which the ropes are received and held against displacement from the groove, said front wall gradually diminishing nwidth toward the point `where the ropes enter the groove.v

3. In a Fourdrinier paper makingmachine the combination of a dryer roll having a. peripheral groove adjacent its front end, carrier ropes arranged to runin said groove and a rope guard.

arranged to prevent the carrier ropes leaving said groove, said guard comprising a front wall lying perpendicular to the periphery of the roll immediately in front of the groove, and side walls projecting rearwardly over thegroove to form a channei in which the ropes are received immediately in advance of their point of entry into the groove, the side wall of the channel nearest the roll and the roll 4opposing edge of the front wail being positioned close to the periphery of the roll and having approximately the same curvature, the remaining side wall of the channel being provided,'along its rearwardly facing edge, with a de'ector disposed at an l oblique angleto th'e longitudinal axis of the roll so that wads of paper coming in contact with the defiector will be deflected towards the center ofthe roll.

4. In a Fourdrinier paper making machine the combination of a dryer roll having a peripheral groove, carrier ropes arranged to run in said groove and fa rope guard completely encircling` said ropes immediately in advance of their point of entry into said groove, said guard comprising hingedly connected sections permitting the guard to be opened or closed.

5. In a Fourdrinier paper making machine the combination of a rotary drying roll having a peripheral groove, carrier ropes arranged 'to run in said groove, and a rope guard completely encircling said ropes immediately in advance of their point of entry into said groove, said guard comprising a front wall lying ,perpendicular to the periphery of the roll in front of said groove, side walls projecting rearwardly over said groove, a rear wall carried by the upper side wall, the last mentioned side wall being hingedly connected to the front wall and said rear wall being provided with an inclined rearward projection adapted to deiect wads or other accumulations of broken paper away from the ropes and toward the central portion of the roll.

RUSSELL CARPENTER. 

